*
     * @see
     * org.codelibs.fess.crawler.rule.RuleManager#removeRule(org.codelibs.fess.crawler.rule.Rule)
     */
    /**
     * Removes the specified rule from the rule manager.
     * @param rule The rule to be removed.
     * @return true if the rule was successfully removed, false otherwise.
     */
    @Override
    public boolean removeRule(final Rule rule) {
        return ruleList.remove(rule);
    }

        assertTrue(ruleManager.hasRule(rule2));
        assertTrue(ruleManager.hasRule(rule3));

        ruleManager.removeRule(rule2);

        assertFalse(ruleManager.hasRule(rule2));
        assertTrue(ruleManager.hasRule(rule3));

        ruleManager.removeRule(rule3);

        assertFalse(ruleManager.hasRule(rule2));
        assertFalse(ruleManager.hasRule(rule3));
    }

    /**
     * Removes the specified rule from the rule manager.
     *
     * @param rule the rule to be removed
     * @return true if the rule was successfully removed, false otherwise
     */
    boolean removeRule(Rule rule);

    /**
     * Checks if the specified rule exists.
     *
     * @param rule the rule to check for existence
     * @return true if the rule exists, false otherwise
     */